1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* @LANG: c
* @ALLOW_GENFLAGS: -T0 -T1 -G0 -G1 -G2
*/
/**
* Test a high character to make sure signedness
* isn't messing us up.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct high
{
int cs;
};
%%{
machine high;
variable cs fsm->cs;
# We Want the header portion.
alphtype unsigned int;
main := (
0x20 .. 0xefffffff @1 @{printf("gothigh1\n");} |
0xf0000000 @1 @{printf("gothigh1\n");} |
0x200 .. 0xfe000000 @1 @{printf("gothigh2\n");} |
any @0 @{printf("else\n");}
)*;
}%%
%% write data;
void high_init( struct high *fsm )
{
%% write init;
}
void high_execute( struct high *fsm, const unsigned int *_data, int _len )
{
const unsigned int *p = _data;
const unsigned int *pe = _data+_len;
%% write exec;
}
int high_finish( struct high *fsm )
{
if ( fsm->cs == high_error )
return -1;
if ( fsm->cs >= high_first_final )
return 1;
return 0;
}
struct high high;
#define BUFSIZE 1024
char cbuf[BUFSIZE];
unsigned int buf[BUFSIZE];
int buflen = 0;
char numbuf[9];
int numlen = 0;
struct tokenizer
{
int cs;
};
%%{
machine tokenizer;
variable cs fsm->cs;
action bufdigit {
if ( numlen < 8 )
numbuf[numlen++] = fc;
}
action writeDigit {
/* Null terminate the buffer storing the number and reset. */
numbuf[numlen] = 0;
numlen = 0;
/* Store the number in the buf. If the buf is full then
* flush and reset the buffer. */
buf[buflen++] = strtoul( numbuf, 0, 16 );
if ( buflen == BUFSIZE ) {
high_execute( &high, buf, BUFSIZE );
buflen = 0;
}
}
action finish {
if ( buflen > 0 )
high_execute( &high, buf, buflen );
if ( high_finish( &high ) > 0 )
printf("ACCEPT\n");
else
printf("FAIL\n");
}
num = ( digit | 'a'..'f' )+ $bufdigit %writeDigit;
main := ( num $1 %0 | space )* %/finish;
}%%
%% write data;
void tokenizer_init( struct tokenizer *fsm )
{
%% write init;
}
void tokenizer_execute( struct tokenizer *fsm, const char *_data, int _len )
{
const char *p = _data;
const char *pe = _data+_len;
const char *eof = pe;
%% write exec;
}
int tokenizer_finish( struct tokenizer *fsm )
{
if ( fsm->cs == tokenizer_error )
return -1;
if ( fsm->cs >= tokenizer_first_final )
return 1;
return 0;
}
struct tokenizer tok;
void test( char *cbuf )
{
int len = strlen( cbuf );
high_init( &high );
tokenizer_init( &tok );
tokenizer_execute( &tok, cbuf, len );
if ( tokenizer_finish( &tok ) <= 0 )
printf("Tokenizer FAIL\n");
}
char data[] =
"10 20 30 40 50 200 300 400 \n"
"d0000000 f0000000 fd000000 fe000000\n"
"ff000000 ffffffffffffffffffffffffff\n"
"ff\n";
int main()
{
test( data );
return 0;
}
#ifdef _____OUTPUT_____
else
gothigh1
gothigh1
gothigh1
gothigh1
gothigh1
gothigh2
gothigh1
gothigh2
gothigh1
gothigh2
gothigh1
gothigh2
gothigh1
gothigh2
gothigh2
gothigh2
else
else
gothigh1
ACCEPT
#endif
|
